<html>
    <head>
        <title>Set Timeout</title>
        <style>
            .red_box {background-color: red; width = 20%; height: 100px; border: none;}
        </style>
        <script>
            function show_div(){
                setTimeout("create_div()", 5000);
            }
  
            function create_div(){
                d = document.createElement('div');
                d.className = "red_box";
                document.body.appendChild(d);
            }
        </script>
    </head>
    <body>
        <button id = "b" onclick = "show_div()">click</button>
    </body>
</html>